Effect of friction stir welding on hydrogen content of ISO 3183 X80M steel
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Authors
Hoyos, J.
Pereira, V.F.
Giorjao, R.R.
McNelley, T.R.
Ramirez, A.J.
Subjects
FSW
High strength steel
Diffusable hydrogen
Underwater welding
Hot extraction method
High strength steel
Diffusable hydrogen
Underwater welding
Hot extraction method
Advisors
Date of Issue
2016
Date
Publisher
Elsevier
Language
Abstract
The influence of Friction Stir Welding (FSW) on hydrogen content of ISO 3183 X80M high strength
steel was evaluated for several welding conditions, including dry and underwater environments. The diffusible and non-diffusible (residual) hydrogen were measured by a hot extraction method that
involved adaptation of ISO 3690 and AWS A4.3 (arc welding process) standards. It was found that FSW
does not significantly influence the hydrogen content under dry conditions even when the steel surface is oxidized. A slight increase in both diffusible and residual hydrogen content was observed for underwater FSW. However, the total hydrogen content is significantly less than the minimum allowable hydrogen concentration in similar steels. In addition, the low tool temperature reached during underwater FSW suggests the absence of hydrogen generation by water molecule decomposition. This is in according with the temperature distribution in water obtained by finite element method simulation of this welding process. Therefore, FSW is a feasible welding process and offers important advantages in terms of hydrogen control when it is compared to conventional fusion welding processes.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.1016/j.jmapm.2016.01.012
Series/Report No
Department
Mechanical and Aerospace Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Instituto Nacional de Ciência, Technologia e Inovação em Materials Complexos Funcionais, Inomat
Funder
CNPq Project 455275/2013-0
CNPq Project 403530/2014-8
CNPq Project 403530/2014-8
Format
8 p.
Citation
J.J. Hoyos, V.F. Pereira, R.R. Giorjao, T.R. McNelley, A.J. Ramirez, "Effect of friction stir welding on hydrogen content of ISO 3183 X80M steel," Journal of Manufacturing Processes, v. 22, (2016), pp.82-89
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.